Automatic continuous liming device



Aug. 15, 1933. E c zlT owsKl 1,922,411

AUTOMATIC CONTINUOUS LIMING DEVICE Filed April 7, 1950 4 Sheets-Sheet l 32 BY fMw0/%m A TTORNE Y5.

Aug. 15, 1933.

E. c. ZITKOWSK! AUTOMATIC CONTINUOUS LIMING DEVICE Filed April '7, 1950 4 Sheets-Sheet 2 INVENTOR.

A TTORNE Y5.

Aug. 15, 1933. E. c. ZITKOWSKI I 1,922,411

I AUTOMATIC CONTINUOUS LIMING DEVICE Filed April 7, 1930 4 Sheets-Sheet s INVEN TOR.

f. ZM-

A TTORNE Y5.

Aug. 15, 1933. E. c. ZITKOWSKI AUTOMATIC CONTINUOUS LIMING DEVICE 4 Sheets-Sheet 4 Filed April 7, 1930 l N VEN TOR.

A TTURNEYS.

Patented Aug. 15, 1933 UNITED @"sryri:s

1,922,411 e A TOMA C CONTINUOUS LIMINGQDEVICE. 7

Emil pap Z itkowski, sa FernandoQP. I.' I Application April '7, 1930; serial 1%. 442,198? j r 11 Claims. (C1.:12'l.14)"

I My invention relates to limingidevicesr The principal object is to provide a'devic'e that automatically and. continuously feeds (the proper proportion of a liquid, such as milk'of lime, to a con- H l tinuous, varying'flo'w ofrm'aterial, such asto a flow of sugar ca'nejuice in the process of making cane'sugar; Y 'j' o In the manufacture of cane sugar ith'asbeen found thatliming of the cane juice 'must be ac- .cura'tely donelin order to obtain the Joe'stresults and that a homogeneous mixture ofjlime and juice beforeheating is'i of. great importance.

Heretoforathe milk of lime has been added in abatchfprocess, and since large quantitiesjmust be treated, theefiect has been that partof the juice isoverlimed, 'givinglrise to .difliculties later on in the process.

It is an object of my invention to provide a de Vice for continuous liming, whereby, the proper amo'unt's wof a chemical reagent such as milk of lime and the juice are thoroughly an'dfquickly mixed in a continuous'fiowin order to overcome thefaforementioned 'difliculties.

In order gthat(the'properamount 'of milk of -lime may be'introduced, it is an object of the in- 'ven'tionto automatically regulatethejfiow'o'f the milk of limebyftheflow' of thiejuicejwithout the fuse of valves.

" of lime and thearnount of juice. 7

other objects reside in providing simple and efiicient means "for carrying out the foregoing results. V v Other objects will appear in thecourse' of the following description and are carried" out by novel details of construction and. by'novel' combinations and arrangements of parts; hereinafter to be described. 7 I V In the drawings like reference characters des- 'ignate similar parts in the several views.v

Figure 1 is a broken elevation 'of a device embodying the foregoing objects.

Y Figure 2 is a plan view of said device. Figure 3 is an enlarged section taken on the line 3-3 of Figure 2. v gure 4 is an enlarged section takenon the line 44 of'Figure2.

aninlet pipe fiandan outlet pipe}? and ha s'par- A still further object' is 'to provide means for' I I i changingthe ratio between the amount of milk compartment 25 of the lime box. Pipe 39' is controlled 'by a valve 40. Milk of lime 9o Figure 5 is an enlargedsection taken onthe titions '10 and 12 dividing the tank into compart ments or chambers13, 14 and 15'. The partition 10 is spaced from the' bottom of the tank to'provide a passage 16.""The' partition 12 provides a weir for the tank and has'a \l-shaped overflow 0 1'7, whereby juice from compartment 14 flows into compartment 15. 'Drains l8 fan'd 19-are provided for the compartments '14 and 15 respectively for the discharge'of wash water. Suitable valves areemployed in these. drains. A lime meter box 20 is provided on aplatform 21 supported by ,brackets22. Ifhe lime box*20 has partitions 23 and 24, providing compartments or chambers 25, 26 and 2'7. The partition 23 is l spaced from the bottom of the lime box to provide a passage 28 between compartments 25 and 26,

and the partition 24 provides a Weir for the boxand has a V.-'-shaped overflow29'between' cornpartments26 and 27. A pipe 30 drains'compart-y v m'e'nt 27,01? the lime meter box andempties into I compartment 15 0f the comparatively. large juice tank. Limexis pumpedfrom'a supply tank 31 by a pump' 32' actuated by a" motor'33. The pump draws liquid from thesupply tank through a so stub-pipe 34 and forces the liquid' into a circu lating system comprising parallel, vertical pipes ,'35 and 36, connected by a cross-pipe-37f A vent for the system is provided at: 38. Theliquidj is raised in the pipe 35, and returns to the supply 135 .tank by the pipe 36'. Q I Y "A portion of the liquid raised in the pipe-"3'5 -flows' ther'efrom through anjoutlct pipe 39 into The outlet from the-pipe pours on to'a spreader 41 supported under the outlet-o f'outlet pipe '39-by arms 42 hooked over 'the edgeof the wallsof the compartment 25;

In compartment 26 an adjustable overflow pipe 43 is provided for-determining the level of milk of lime in the lime'metertank. The pipe 43 re-,

:turns overflowing liquid tothe supply tank; An internallyqtapering collar 44 is screwed to the upper extremity of the overflow pipe. An ad- 90 justable sleeve '45 has a; slip fit with the collar 44. A bail 46 forithe sleeve 45 has a threaded connection witha supporting rod 47.

iQperating means for raising and lowering the sleeve 45 wherebyto raise and lower the level of milk of lime in compartment26, is supported on. legs 48 on the platform 21. Such means comprise abar 49 supportedon the legs and bearings '50 'boltedon the bar. V A slide rod '51 is mounted betweenthe 'bearings 50. A screw 52 is rotatably supported in the bearings 50, and has a hand wheel 53 on a projecting portion.

A movable head 54 has a smooth opening 55 and a threaded opening 56. The rod 51 projects through the smooth aperture whereby the head slides on the rod and the screw 52 is in engagement with the threads in the other opening 56. Thus rotation of the screw 52 advances or retracts the head 54, depending upon the direction of rotation of the screw. The head 54 carries a pointer 5'7 that cooperates with a graduated scale 58 on the bar, 49, to measure the amount of lime introduced into the juice.

A lever 59 is pivotally mounted on a projecting arm 60 on the head 54. A standard 61 on the bar 49 supports the lever 59 during inaction of the present device, or when the juice drops to a predetermined level. A float 62 is pivotally supported on the projecting end of the lever 59 by a rod 63 projecting through a slot 64 in the bar 49, and screwed into a yoke 65 pivotally fastened to the lever 59. A nut 66 and a lock nut 67 are screwed on'the rod 63 to support the rod on the bar 49 at any desired height.

A counter weight 68 is fixed on the end of the rod 63 and tends to draw the float and rod 63 downward. The lever 49 has a slot 69 in which slides a pin 70 that holds a yoke '71 fastened at an end of a connecting shaft 72, which in turn has a threaded connection with the rod 47, supporting the sliding sleeve 45. A guide '73 is provided on the bar 49 for the connecting shaft '73.

In-the operation of the present apparatus, the motor for the pump isv started, which causes the milk of lime to circulate through the pipes 35, 36 and 37. Lime thereby pours through the outletpipe 39 and on to the spreader 41, which permits the entrance of fresh milk of lime into the meter box with the minimum disturbance of the lime already therein.

The lime finds its level in the compartments 25 and 26, and any excess overflows. into the pipe 43 and is returned to the supply tank. Raw cane juice is admitted to the compartment 13 of the juice tank through the pipe 8.

The juice finds its level in compartments 13 and 14; When the juice rises to a predetermined level, such as when the juice begins to flow over the weir 12 into compartment 15, the float is raised. Thus the sliding sleeve 45 is raised through the .intermediary of the lever 59. connected with the float, which raises the level of the lime whereby it overflows into compartment 27 over the weir 24 and is carried by pipe 30 to compartment 15 containing the juice.

As the quantity of juice in the compartment 14 increases, the level of the lime is raised, so that increasing amounts of both lime and juice are feol'into mixing compartment 15 in direct ratio. Just the opposite operation is effected by a decreasing flow of juice, and the weight 68 tends to lower the float, cutting down the supply of lime. The ratio of the amount of lime to the amount of juice may be varied by rotating the hand Wheel 53. The scale 58 provides a means for measuring the change in such ratio.

The mixture of the lime and juice is then carried by the pipe 9 to the next element in the process of refining the sugar, to wit, a clarifier (not shown).

It will be clear from the foregoing that the flow of juice automatically controls the amount of milk of lime that is introduced therein, and that the ratio of the amount of lime to the amount of juice may be varied to suit different needs.

Changes may be made in details of construction and in the arrangements of parts without departing from the spirit of the invention. Moreover, I do not desire to be limited to the exact details and arrangements shown, except as specifically stated in the hereunto. appended claims.

What I claimi 1. In apparatus for the purpose described, a tank adapted to be placed in a flow line of sugar cane juice, a limebox, means adapted to supply lime to said box, continuously, mechanism connected to regulate the level of the lime in the lime box by the quantity of juice in the tank, and means adapted to convey lime from the box to the tank when the lime in the box has reached a predetermined level.

2. In apparatus for the purpose described, a tank adapted to be placed in a flow line of sugar cane juice, a lime box, means adapted to supply lime to said box continuously, mechanism to regulate the level of the lime in said box, a float in the tank connected to operate said mechanism when juice in the tank has risen to a, predetermined level, and means to convey lime from the box to the tank when the lime in the box has reached a predetermined level.

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3. In apparatus for the purpose described, a

tank adapted to be placed in a flow line of sugar cane juice, a lime box, means adapted to supply lime to said box continuously, an adjustable overflow pipe regulating the'level of the lime in the box, a float in the tank controlling the height of said overflow pipe, and means to convey lime from the box to the tank when the lime in the box has reached a predetermined level.

4. In apparatus for the purpose described, a

tank adapted to be placed in a flow line of sugar canejuice, 'a lime circulating system; a lime box, a connection to supply lime from the system to the box continuously, an adjustable overflow determining the liquid level in the box, connected to return overflowing lime back into the system, a connection adapted to convey lime from the box to the tank when the lime in the box has reached a predetermined level, and mechanism to operate said adjustable overflow by the quantity of juice in the tank.

5. In apparatus for the purpose described, a tank for raw juice, means connected with a source to continuously supply lime to the tank, a float in tank, a movable head, a lever connecting the float, controlling said means and fulcrumedon the head, and screw means connected to move the head and thereby the lever relative to said means whereby to vary the ratio of the quantity of lime fed intothe tank to the quantity of juice in the tank.

6. In apparatus for the purpose described, a tank adapted to be placed in a flow line of sugar cane juice, a lime box, means for continuously supplying lime to the. box, the box having a weir providing an overflow, means controlling the I I 8. In apparatusfor; the purpose described, a,

ceiye liquid overflowing thew'eir and w-emey v In mixi pp s, a tank placed in the said liquid from the box, to the tank.

tank adapted to be placed in a flow line of sugar cane juice, a lime box provided with a weir overflow, means to receive andrconvey'to the tank 7 liquid overflowing from the box, mechanism to continuously supply lime "to the box, adjustable means defining the liquid level in the box relative to the overflow, a float inthe'tank connected with the last-mentioned means to automatically select said levels, and a scalerelativeto which the last-mentioned means is adjusted.

9. In mixing apparatus, a tank fplaced inthe flow line of a liquid, a chemical reagent box fed by a-source of supply, an overflowreturn conduit connecting the box with the source, the cona 1 reagent in the reagent box by the quantityof liquid in the tank, and means adapted to convey reagent from the box to the I tank when the duit having an adjustable intake, mechanism to raise and lower the intake comprising-a float in the tank and alever connecting the float with the intake,jand means to convey the reagent from the box to the tank when the reagent reaches a"predetermined-level;'

in the box j .fiowline of a liquid, achemical reagent box fed by a source of supply, an overflow return conduit 4 connecting the box with the source, the conduit having an adjustable intake, mechanism to raise and lower the intake comprising a float in the the reagent in thebox reaches a predetermined level.

:11. In apparatusfortreating liquids, a tank placed in theflowline of a liquidra chemical reagent box, means adapted for the continuous supplyof reagent to the box, mechanism connected to automatically regulate the level of the reagent in the box has reached a predetermined" level.

CARL ZI'I'KOWSKL 5 

